Answer: The old fashioned bearded iris does poorly in the lower parts of the Gulf Coast states, but does quite well in the more northern sections of these states. These irises can take heat and drought, but cannot tollerate poor drainage.
For your best shot at success, plant the rhizomes in late summer to fall. Set them 2 to 2 1/2 feet apart and barely cover them with soil. Then water in well and apply a mulch. If you have problems with the bearded iris, perhaps the Louisiana iris or the Spuria iris would suit your site better.
Q&A Library Searching Tips